"'It's a little darker-themed, I think,' Earworm (real name: Jordan Roseman) tells Billboard about his latest mash-up masterwork, which was released on Tuesday (Dec. 3). The DJ, whose all-encompassing mash-ups have each earned tens of millions of YouTube views, says he even considered making this year's 'United State of Pop' a no-frills ballad, but ended up relying on the instrumental from Swedish House Mafia's 'Don't You Worry Child' to give the mash-up its fair share of uptempo movements.'" -- Billboard